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Letters Patent lVo. 76,014, dated Zlm'c/lt Q4, 1868,-

IMPROVEMENT IN SLATE-IRAMES'.

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TO ALL WHOM IT HAY .CON CERN;

Be itknown that I, W. C. WENDELL, ot' Albany, in the county of Albany, and State of New York, have` invented a new and improved yCushion for School-Slates; and I do hereby declare that the following isha full, clear, and exact description thereof', reference being had to the accompanying drawings, making a part of this specification, in whichi Figure 1 is a front view of a schoolslate having the cushions applied to its frame.'

Figure 2 is a cross-section, showing the manner of retaining the cushions in place.

Figure I3 is a side view of one of the cushions, detached from the frame.

Similar Vletters of reference indicate corresponding parts in the three figures.

The object of this invention is to provide scbool-slates with self-holding elastic cushions, which shell serve to protect desks andtables, upon which the slates are used, from being scratched, or otherwise injured thereby, andalsoto prevent noise in using theslates,` and to protect the slates frombeing readily broken, should they fall or be Suddenly thrown down. .i

Previous to my invention,composition-slates without frames, and also sla-teswith frames, have been protected by 'means ot' smallvcylindrical pieces of India rubber, inserted through holes made through .their corners, so that the ends of said pieces projected from the 4surfaces of the slates, or frames thereof, and thus formed cushions for protecting them. Such cushions have been found' objectionable, and have failed to serve the purpose sought, on account of their being so readily removed, particularly when applied to slates for usein schools.

l To enable othersskilled-inthe art to understand my invention, I will proceed to describe its construction andoperation. l I

4The drawings represent the cushions 'applied to a. slate, A, Vhaving a wooden frame, B, but I shall not conne myinventioh to framed slates, as it is also applicableand particularly useful for the composition-slates which are made without frames. l

The cushions are made with cylindrical necks, a, about the size of the holes in which they fit, anden both ends of" these contracted necks are enlarged heads, i) b, which I prefer to make in the manner shown, that is to sayjof a hemispherical form. This .forni of head serves .as a goed elastic cushion, and presents a'neat appearance upon a slate. It also admits of being forcibly cron'ded through a hole much smaller in diameter than it isand upon being passed through such hole, the sides or flanges of the head will springout to its original shape, and fit tightly upon thesurface ot' the, slate, or the frame thereof.

The neck a, of the cushions b b, maybe made exactly as`long as the thickness of the slate or slate'fram to which it is applied; or it may be made slightly shorter-than said slate or frame. In the latter instance the short necks will, by their contraction, `drenthe dat inner surfaces of the heads or cushions very tight against vthe faces of the slate or slate-frame, and renderit very di'iicult to remove the cushions. In either instance,

no ordinary force will remove the cushions after vthey are once' applied, and they will last as long as the lifetime of lthe slate.

Having described myinvention, I claim as a new andjmproved article of commodity- The elastic cushions b formed upon 'the ends of a contracted neck, a, and adapted for the protection of slatcs, substantially as described` W. C. WENDELL.

Witnesses :l

v WM. STORY,

THEO. Masnnn. 

